Illinois Gas Price Today
Last updated: Wednesday, July 1, 2026 at 04:58 PM GMT+5:30
Today's Illinois Gas Price Average
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Gas Prices by City in Illinois
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| City / Metro | Regular | Midgrade | Premium | Diesel |
|---|---|---|---|---|
| Aurora | $4.361▲ +$0.02 | $4.928▼ -$0.02 | $5.364▼ -$0.03 | $5.015▲ +$0.01 |
| Bloomington | $4.256▲ +$0.01 | $4.810▼ -$0.01 | $5.235▼ -$0.02 | $4.895▲ +$0.03 |
| Champaign | $4.359▼ -$0.03 | $4.926▼ -$0.03 | $5.362▼ -$0.01 | $5.013▲ +$0.02 |
| Chicago | $4.228▲ +$0.01 | $4.777▼ -$0.01 | $5.200▲ +$0.02 | $4.862▲ +$0.03 |
| Elgin | $4.242▲ +$0.02 | $4.793▼ -$0.02 | $5.217▲ +$0.03 | $4.878▼ -$0.01 |
| Joliet | $4.359▲ +$0.02 | $4.926▲ +$0.02 | $5.362▼ -$0.03 | $5.013▲ +$0.01 |
| Naperville | $4.343▲ +$0.03 | $4.908▼ -$0.03 | $5.342▲ +$0.01 | $4.995▼ -$0.02 |
| Peoria | $4.238▼ -$0.01 | $4.789▼ -$0.01 | $5.213▲ +$0.02 | $4.874▼ -$0.03 |
| Rockford | $4.251▲ +$0.03 | $4.804▲ +$0.03 | $5.229▼ -$0.01 | $4.889▼ -$0.02 |
| Springfield | $4.349▼ -$0.02 | $4.914▲ +$0.02 | $5.349▼ -$0.03 | $5.001▲ +$0.01 |
| Waukegan | $4.336▼ -$0.02 | $4.899▼ -$0.02 | $5.333▲ +$0.03 | $4.986▼ -$0.01 |
How Does Illinois's Gas Price Compare to the National Average?
The national average gas price today is $4.052/gal for regular unleaded. Illinois's average of $4.308/gal is 0.256/gal higher than the national average. Factors such as state fuel taxes, refinery access, and distribution costs contribute to this difference.
Frequently Asked Questions
What is the gas price in Illinois today?▼
Today's average gas price in Illinois is $4.308 per gallon for regular unleaded fuel. Midgrade averages $4.868, premium is $5.299, and diesel is $4.954 per gallon. Prices are currently trending down and updated daily from AAA data across the state.
Is gas cheaper in Illinois than the national average?▼
Illinois's regular gas price of $4.308 per gallon is $0.256 per gallon higher than the national average of $4.052. This price difference stems from state fuel tax rates, proximity to refineries, and regional supply chain factors that vary by location.
Which city in Illinois has the cheapest gas prices?▼
Chicago has the cheapest gas in Illinois today at $4.228 per gallon. Prices can vary within states due to local competition, distribution costs, and proximity to supply terminals. Use the map to find gas prices near me in your area.
Why is diesel more expensive than regular gas in Illinois?▼
Diesel in Illinois is $4.954 per gallon while regular gasoline is $4.308 per gallon. Diesel pricing reflects higher refining costs, increased federal and state diesel taxes, and seasonal demand from the trucking and agriculture sectors that can push prices above gasoline.